Pneumatic dispatch outlet valve



Patented Mar. 1 5 1932 JOSEPH aon n'sronrznu, or QUEENS vmmeauew YoRjKj-As'sritoit holder's ATfiAs I sYsrE'urs'; me; or NEW"YORK;.1\TL Y., .A eeR-roRATIoN or'mw YO K P VEUMA I ID-ISPATCH OUTLET VALVE Application-filedJanuary iM, 19 30; serial; N5." 42am. I

delivery; thefa ri'arigeiiient however being 7 The: present ihv'entien relates teo neflm tie dispatch service systems and hasfor anob e'Ct" to provide an improved delivery ap aratus;

' ,This application'ifs a continuation in part of o November 19, 1928;, o r i 1 a a he delivery of'the carrier at high speed oflers certain obvious'ob'jec'tions such as the 10 bouncing of the arrier at' the' deliver ta. tion and the noise of delivery. The present invention'provides an improved arrangement whereby an air cushion is' formed to retard. :the carrief'a's it approaches ,thefpoint of such as not to interfere with thejjactual' del livery of the carrier when it reaches the 'de? livery diltle tl In the preferred embodiment to be more particularly" described the 2 urpose-s of'illustrating theprinciples ofthe invention, the operation is entirely automatic, ther ai'faiigement' being such that the pressure bu'ilt' up'in front of the movi n'g'carrie'r in' the deliver end of-the tube will not v open the delivery door while the door is; nevertheless,- left fr'e to be opened by the carriritself engaging the ee Inthepreferred embodl ment also provision is madewhereby the con -troI valve: is caused to beclosed byifthepres o sure built up in the delivery'tube asj the car-v rier approaches the point otdelivery, I f The nature and ob" ects'of the inventionnwillbe better understood from a descriptionofa selected illustrative embodiment for the purrposes of which description reference should be had to the accompanying drawings form-p ing a part hereof and which- I v Figure l is a diagrammatic View of a pneun matic dispatch system showing an improved 40 delivery apparatus embodying the presentinventi'on, and Y Figure 2 is a delivery apparatus.

vThe arrangementshown for the purposes 7 of illustration makesprovisioii for retslirding.

the carrier before delivery by causingfa-n air cushion .to be formed" i'i1\,t deliv'ery 1 ahead of theeaf-ri er; the delivery valve being held *cfl'o'se'd against the fair cushion pressure untilt'he carrier engages said valve wherethe vane j thereomthe weight of the amer will be'surlfo rcausingthe i i e flar i or H i .v {tube 16 will ween e-Singer said valve; The 19 j upon'flit may-be freelyopened to permitidischarge of. the v carrier. xA's shown, the. lower 'elidof a'yertical carrier tube 5 wherethe carr er 'would' ordinarily I be discharged at particularly highyelocity isprovided witha delivery yalve pivoted'at 7:111 the casing and. having a pressure balancing vane ..9

'iwliich is ashearly as possible of the same area. asthe'main .yalve. The area o fthe balancing vane 9 maybe slightly greater'thari that of- 66" 'itthe. weight is not rsufficientto Yhold the valve closed during operation; The

vane 9 is weightedlas iudica tedfat to insure closing off the valve but the weightg isi too,

valve by the weight'of the carrier. As the 11' and a'ppreac'hes the delivery valve, the'air;

ahead 'o'fthe' carrier will-be confined to form an air cushion effective to retard the carrier 70 so that; it approachesthe valve with negligij 've e' i r n w P va ve (i nte: 'In'atica-lly held closed because: the pressure of air ic usesa'ferce against the area of-the and'rwliic'h is" e ual to the force against thevane (i 'bultfas carrier actuallyi engages the valve or an upstand ng fini l2-flformed ficieiit to 0 en saidfv'alve -l, I j

The a ngernent-des'crlbed has bee eeg veloped more1'particiullar1y; for use' with vac uum'dispatch systems; A controlvalveoithe type commonly used in "said" systems is'shown at 15 'lt isfdesiratlethat thiscontrdl valves? be, closed as the carrier approaches, the-Yde tube to; actuate. 'siiid ment shown t to close :thesuctiori tube QI-betwee' the age 7 trol'val vegaiidthe mai T valve is'"pivote at ee inyaiveea g "e that' th the v I ive'teasing;disconnected;9G iv a tube andfajegnallj.eonn fingtube17,, detail sectionalview of said-l t m i Qfthb 1 1 v Hallie whet 'bythefcontrolvalye'will'becl 1011. Pref erab'ly' also an uxiliary valve '20 arranged 96 embodiment is illustrative merely and is not intended asdefiningthe limits the invention.

I claim:. a 1. In a pneumatic dispatch system, the combination with a pneumatic dispatch tube of a delivery valve arranged to be opened by;

the engagement of the carrier'thereagainst and means responsive to the pressure of air ahead of an approaching carrier for holding said valve closed, said means being inoperative to cause opening of the valve when the pressure in the line is sub-atmospheric.

2. In a pneumatic dispatch system, a twopart delivery valve, one part being arranged to open to permit discharge of a carrier, the

other part responding to pressure of air ahead of the carrier to hold the first part 7 closed against said'pressure.

3. In a pneumatic dispatch system, a twopart delivery valve, one part being arranged to open to permit discharge of a carrier, the

other part responding to pressure of air ahead of the carrier to hold the first part closed against said pressure, and means to hold said valve closed when there is suction in the line. v a

4:. In a pneumatic dispatch system, the combination with a carrier delivery tubeand a suction tube entering laterally thereof of a valve in said suction tube actuated by the pressure of'air ahead of the carrier in the delivery unit for closing said suction tube while leaving the delivery tube open for the passage of the carrier.

5; In a pneumatic dispatch tube system, the combination with a delivery tube of a delivery valve normally closing said tube having oppositely acting balanced pressure areas'whereby increase or decrease of pressure in the delivery tube will not open the valve. a

6. In a pneumatic dispatch tube system, the combination with a delivery tube of a two-vane pivoted valve normally closing said tube, the vanes being of substantially equal areas whereby neither pressure or suction within the tube will open the valve, said valve being arranged to be opened by the weight of the carrierthereagainst.

7. In a pneumatic dispatch system, the combination with a dispatch tube, a carrier delivery unit and a control valve controlling the s'uctionin the dispatch tubeand having a pressure responsive diaphragm chamber,

ota connection between the delivery unit and the diaphragm chamber arranged to admit .air from the delivery unit to said chamber to cause a closing of the control valve when the air pressure is built up in the delivery unit ahead of an approaching carr1er.

8."In a' pneumatic tube. dispatch system, the combination with a discharge tube for delivery of a carrier substantially fitting said tube of a valve normally closing said tube but positioned to be moved aside by the pressure of the carrier there against and means responsive to airpressure in the tube tending to hold said valve in closed position against the action of the air pressure in the tube tending to open the valve thus retarding'the passage of the carrier, substantially as described.

9 In ,a pneumatic dispatch system, the

combination with a carrier delivery unit com prising a .delivery tube and a separate suction tube of a valve actuated by the pressure of air ahead of the carrier in the delivery unit for closing said'suction tube.

10. In a pneumatic tube dispatchsystem, the combination with a discharge tube for delivery of a carrier substantially fitting said tube of a'valve in the tube arrangedto be held closed automatically by the change of air pressure, which movement of a carrier causes in said tube, to obstruct the flow of air and thereby to impede the movement of the carri'er as it approaches the point of delivery',

substantially as described.

11. In a pneumatic tube dispatch system, the combination with a discharge tube for delivery of a carrier substantially fitting said tube of means for checking the movement ofa carrier as it approaches the point of delivery comprising a valve having larger and smaller areas exposed to pressure of the air within the tube,the arrangement being such that the pressure on the larger area tends to close the valve and the pressure on the smaller area tends to open the valve, substantially as described.

12. A pneumatic tube discharge section as defined in the preceding claim in which the portion ofthe valve presenting the smaller area obstructs the discharge tube and is arranged to be moved from obstructing posiposed transversely of the tube and arranged to be moved aside by the carrier engaging therewith and on the other side of the pivot a portion of larger area exposed to the presme within the tube and so arranged that the air pressure within'the tube when efle'ctive against both areas tends to hold thevalve in closed position thereby retarding the passage of the carrier, substantially as described.

14. A pneumatic tube line comprising a discharge tube section'for delivery of a carrier substantially fitting said tube and a valve Closing said discharge tube to provide a compression chamber for retarding the carrier comprising a pivoted valve member having on one side of the pivot a portlon of smaller area disposed transversely of the tube and arranged to be moved aside by the carrier engaging therewith and on the other side of the pivot a portion of larger area exposed 'to the pressure Within the tube and so ar ranged'that the air pressure Within the tube when efiective against both areas tends to hold the valve in closed position, substan-' tially as described.

In testimony whereof, I have signed my time to this specification this 8th day of January, 1930. V l JOSEPH JOHN STOETZEL. 

